FastRawViewer doesn't change raw files. Instead, we write a sidecar XMP file with the parametric edits. Adobe applications (Camera Raw, Lightroom) will pick the change in EV. You can find more in our Manual, please have a look at https://www.fastrawviewer.com/usermanual14/exposure under "Recording of the exposure correction to XMP files: Interaction with Adobe Programs".
FastRawViewer doesn't change
FastRawViewer doesn't change raw files. Instead, we write a sidecar XMP file with the parametric edits. Adobe applications (Camera Raw, Lightroom) will pick the change in EV. You can find more in our Manual, please have a look at https://www.fastrawviewer.com/usermanual14/exposure under "Recording of the exposure correction to XMP files: Interaction with Adobe Programs".